So far, over 58 lakh families of the state have been registered under the scheme, he apprised saying, ''spreading awareness about the scheme among the poor families was the biggest challenge before us.'' Recalling an incident where, a man sold his around 3 acres land here for the treatment of his sister, but still failed to meet all the expenses of the treatment, Yadav said, '' Had he been knowing about the National Health Insurance Scheme (NHIS) and its benefit, he would have not faced so much trouble.''